Someone who addresses their views with an amount of passion is said to be standing on their soapbox.

In public places like London's Hyde Park individuals can advocate one cause or another. Some speakers in these public forums will bring a 'soapbox' to project their voice and to be seen by those who might cluster around.

If you would get off your soapbox for a minute, you'd hear what I have to say.

(n.) a downhill race for american children, where they design go-carts that have no steering, to get them used to the fact that american roads have no corners, and american cars cannot turn worth shit.